SusMat
·
2022
·Vol. 2
·期 3
·379-390
·
IF 0
Xiang Chu,Yihan Wang,Lucheng Cai,Haichao Huang,Zhong Xu,Yanting Xie,Cheng Yan,Qing Wang,Haitao Zhang,Hong Li,Weiqing Yang
The wide-spread proliferation of aqueous MXene-based supercapacitor has been largely shadowed by the limited cell potential window (typically in the range of 0–0.6 V). To address this baffling issue, designing asymmetric supercapacitor (ASC) is proposed as a rational strategy to enlarge the potential window (thus energy density) of individual cell in aqueous electrolytes. To this date, however, it still remains a great challenge to develop easy fabricating, 3D nanostructured, and pseudocapacitive cathode materials that can perfectly match with MXene anode materials. In this work, we propose a supramolecular strategy to construct conducting polymer hydrogel (CPH) with highly interconnected 3D nanostructures and large pseudocapacitance, which can finely match with 2D Ti 3 C 2 T x . The as-assembled CPH//Ti 3 C 2 T x ASC with CPH cathode and MXene anode can operate in a broadened potential window of 1.15 V in aqueous PVA/H 2 SO 4 gel electrolyte with remarkably improved energy density of 16.6 μWh/cm 2 (nine times higher than that of symmetric MXene supercapacitor). Additionally, this ASC exhibits outstanding cyclic stability with no trackable performance decay over 30,000 galvanostatic charge and discharge cycles. It is demonstrated in this work that employing positive CPH electrode is a feasible yet promising strategy to enhance the potential window and energy density of aqueous MXene supercapacitors.
研究领域:
材料科学
·
能源存储
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纳米技术
✓ 已验证
DOI
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 10
·682
·
IF 2.7
Yin Chunmei,Li Qinghua,Lu Zhiyi,Shi Yaochen,Lin Wei
A highly sensitive pressure-sensitive sensor based on MXene was developed using the electrostatic self-assembly method, with carbide sponges as the elastic substrate and a rational design. Specifically, CTAB was used to treat the carbide triamine sponge and conduct the electrostatic self-assembly with MXene to achieve a tightly combined conductive filler and substrate. The resulting pressure sensor showed excellent performance, with a high sensitivity of 15.05 kPa −1 under a range of 0–20 kPa, a response time of 0.1 s, and high durability under 2000 loading–unloading cycles. The minimum detection limit of the sensor was as low as 0.3 Pa, demonstrating excellent monitoring performance. Additionally, finite-element simulation analysis showed that MXene@CTAB@CMF had even better sensing performance at the same stress level. Moreover, the pressure sensor exhibited good sensing performance for various physiological signals and daily work monitoring of the human body, indicating its potential application value.
研究领域:
生物医学工程
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纳米医学
·
柔性电子学
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传感技术
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xiaoyu Jia,Yuan Du,Fanyu Xie,Binze Lin,Hui Cao,Hongwei Li,Mei Zhang
Fiber-typed supercapacitors are promising energy storage devices for wearable electronics, and the microstructure of graphene fiber electrodes for flexible supercapacitors plays a significant role in the ion diffusion efficiency and energy density improvement. In this paper, we report a coaxial microfluidic spinning technology, ammonium bicarbonate solution as the core flow, and graphene oxides and MXene quantum dots (MQDs) composite spinning dispersion as the sheath flow to fabricate the hierarchical porous MQDs/graphene composite fibers (MQDs@PGF). 0D MQDs as electrochemically active materials were intercalated into graphene nanosheets; the ammonium bicarbonate solution acts as a foaming agent to realize a hierarchical porous structure of micro-meso-macroporous and a large specific surface area (68.8 m2 g–1), which greatly shorten the ion diffusion channels and provide more electrochemically active sites. The assembled fiber-typed supercapacitors (MQDs@PGF FSCs) exhibit a high specific areal capacitance of 1288 mF cm–2 and maintain a high capacitance retention of 95% after 9000 cycles. The MQDs@PGF FSCs achieve an excellent energy density of 147.5 μWh cm–2 under a wide operating voltage window of 0–2.5 V and successfully power small electronic devices. This method provides a strategy for the controllable design of high-performance fiber electrode materials and promotes energy storage applications in wearable portable devices.
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产品关联
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-14
·
IF 12.264
Wang Yuanming,Wang Xue,Li Xiaolong,Liu Rong,Bai Yang,Xiao Huanhao,Liu Yang,Yuan Guohui
All-pseudocapacitive and highly deformable MXene hybrid film is successfully fabricated by a facile and efficient vacuum-assisted filtration of ultrathin MoO 3 nanobelts and delaminated MXene nanosheets.
The optimal M/MoO 3 hybrid electrode delivers an ultrahigh volumetric capacitance of 1817 F cm −3 (545 F g −1 ), which exceeds large majority of previously reported MXene-based flexible electrodes.
The symmetric supercapacitor presents excellent energy density of 44.6 Wh L −1 (13.4 Wh kg −1 ), indicating the electrode promising in achieving high-energy-density devices.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Guifen Sun,Peng Wang,Yongxiang Jiang,Hongchang Sun,Chuizhou Meng
The continuous real-time monitoring of human physical health is crucial in the pursuit in a high quality of modern life and has attracted a great deal of attention in research on advanced wearable pressure sensors. However, most of the previous sensors have been built on flexible solid substrate that is not air permeable, leading to skin inflammation after a long-term skin attachment. Herein, we have developed a flexible and breathable pressure sensor based on nonwoven fabrics decorated with MXene as fabric electrodes and an ionic gel as a fabric electrolyte. Due to the advantages of both the supercapacitive iontronic sensing mechanism and the hierarchical structures of the nanoscaled stacked MXene wrapping on the microscale fabric framework, the optimized pressure sensor exhibits a high sensitivity of 31.40 kPa–1 (0–10 kPa), a wide detection range of up to 80 kPa, and a short response time of ∼45 ms as well as excellent repeatability and cyclability. The fabric sensor can be seamlessly woven into textiles for practical wearable sensing and is capable of detecting subtle arterial pulse beats at the wrist and weak breathing rhythms at the chest without affecting the comfort of the wearer. The incorporation of the developed fabric sensors into commonly used clothing through a facile manufacturing process is promising to achieve a comfortable health diagnosis.
研究领域:
材料科学
·
生物医学工程
·
电子工程
✓ 已验证
DOI
高影响因子
Research
·
2020
·
IF 0
Yao Lu,Xinyu Qu,Wen Zhao,Yanfang Ren,Weili Si,Wenjun Wang,Qian Wang,Wei Huang,Xiaochen Dong
Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition. However, it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors. Herein, highly stretchable, sensitive, and multifunctional flexible strain sensors based on MXene- (Ti 3 C 2 T x -) composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared. The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel, endowing the flexible sensor with high sensitivity. The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels. The resulting nanocomposited hydrogels featured great tensile performance (2400%), toughness, and resilience. Particularly, the as-prepared flexible pressure sensor revealed ultrahigh sensitivity (10.75 kPa -1 ) with a wide response range (0-61.5 kPa), fast response (33.5 ms), and low limit of detection (0.87 Pa). Moreover, the hydrogel-based flexible sensors, with high sensitivity and durability, could be employed to monitor full-range human motions and assembled into some aligned devices for subtle pressure detection, providing enormous potential in facial expression and phonation recognition, handwriting verification, healthy diagnosis, and wearable electronics.
研究领域:
材料科学
·
纳米技术
·
传感器
·
柔性电子
·
可穿戴设备
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tianrui Cui,Yancong Qiao,Ding Li,Xiaorui Huang,Le Yang,Anzhi Yan,Zhikang Chen,Jiandong Xu,Xichao Tan,Jinming Jian,Zhen Li,Shourui Ji,Houfang Liu,Yi Yang,Xuegong Zhang,Tian-Ling Ren
With the advent of an aging society and increasing concern for cardiovascular health, comfortable long-term electrocardiographic (ECG) monitoring systems in daily life are much in demand. If the system can give real-time feedback on cardiovascular status and offer timely personalized advice like doctors, it will be beneficial to promote cardiovascular health and alleviate the imbalance of medical resources. Herein, we report a multifunctional, conformal, and air-permeable electronic skin (e-skin) based on MXene-Polyurethane mesh (MPM). When used as ECG electrodes, the e-skin shows ultra-low electrode–skin contact impedance (4.68 kΩ at 1 kHz), high signal-to-noise ratio (16.5 dB), and high breathability (2.1838 kg/m 2 /day), and can be continuously worn for at least 7 days. As a strain sensor, the e-skin exhibits a large measurement range (>40 %) and unique segmental sensitivity (GF = 172.54 in 0 ∼ 18.64 % and 79.38 in 18.64 ∼ 50 %), which is suitable for detecting both subtle and large physiological signals. More significantly, by combining the MPM e-skin with a flexible printed circuit board (FPCB) and a merged convolutional neural network & long-short-term memory (CNN & LSTM) intelligent algorithm, the acquired wearable intelligent e-skin system can realize daily 12-hour 12-lead ECG monitoring with diagnostic accuracy over 99 % for four arrhythmias. These results show that the MPM e-skin has huge potential in multifunctional intelligent healthcare systems. In particular, an intelligent ECG system similar to a “daily doctor” is proposed for daily long-term cardiovascular health monitoring.
研究领域:
生物医学工程
·
柔性电子学
·
心血管监测
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智能医疗系统
·
转化医学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Wenjuan Zhang,Qiaohong Zhang,Xiangyue Yang,Mengyu Ran,Yezhi Ding,Peiqing La
Conventional homogeneous catalysts for photo-Fenton reactions suffer from inherent drawbacks, including difficult recovery, poor stability, and rate-limiting steps, which significantly restrict their practical application. To overcome these challenges, a novel photo-Fenton catalytic support, MXene–porous polydopamine (MPP), was fabricated via an interfacial co-assembly strategy. Subsequently, nano zero-valent iron (Fe) was anchored onto the MPP framework to construct a magnetic MXene–porous polydopamine (Fe/MPP) catalyst. The unique multi-interfacial porous structure of Fe/MPP facilitates efficient mass and electron transport, while the synergistic effects of Fe redox cycling and phenol–quinone conversion under light irradiation enhance the Fe 3+ /Fe 2+ regeneration process. As a result, Fe/MPP achieved outstanding photo-Fenton degradation performance, removing 99.89 % of methylene blue (MB, 4 g/L) within 30 min, surpassing most previously reported homogeneous catalysts. Moreover, Fe/MPP exhibits excellent reusability, maintaining over 53 % degradation efficiency after ten consecutive cycles. These results demonstrate that Fe/MPP exhibits high photo-Fenton activity and cycling stability, showing promising potential for practical wastewater treatment applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Xiaomin Hu,Zhe Chen,Jiayou Ji,Liang Li,Huabo Huang,Shidi Wei
Fiber-shaped supercapacitors (FSCs) serve as optimal energy storage components in wearable platforms. However, traditional fiber materials suffer from poor interfacial cross-linking, disordered microstructures, insufficient active sites, and low electrical conductivity. To overcome these challenges, this research develops Zn-MoO₃/Ti₃C₂Tₓ hybrid fibers via wet-spinning technology employing glacial acetic acid as a coagulation bath, with MoO₃ quantum dots intercalated into Ti₃C₂Tₓ interlayers and Ti₃C₂Tₓ nanosheets cross-linked by Zn 2+ . The resulting hybrid fibers feature expanded interlayer spacing, a large ion-accessible surface area, abundant porous channels, exceptional electrical conductivity, and excellent mechanical properties, delivering an exceptional volumetric capacitance of 2078.2 F cm −3 at 2 A cm −3 with 75.0 % capacitance retention at 20 A cm −3 . Furthermore, the constructed FSCs achieve a substantial energy density of 55.6 mWh cm −3 at a power density of 400 mW cm −3 , with 94.7 % capacitance retention after 5000 cycles, and successfully power an electronic timer, demonstrating their potential for wearable applications.
研究领域:
材料科学
·
纳米科技
·
能源存储
·
柔性电子
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Jingxin Zhao,Hongyu Lu,Xijun Wei,Yuanyuan Gao,Yingze Song,Bingang Xu
Constructing a Zinc ion hybrid supercapacitor (ZHMSC) configuration with excellent electrochemical performance for progressive energy storage is worldwide attractive but yet still a considerable challenge. In this study, a universal and effective strategy has been proposed and developed for 3D-writing additive-free V 2 CT x MXene architected ZHMSC to realize the excellent electrochemical performance. With proper designs of printable electrochemical materials and direct ink writing architectures, 3D printed ZHMSC devices with high areal capacitance and excellent areal energy density have been achieved in a limited footprint area. Benefitting from the excellent ion diffusion and highly conductive networks, the 3D printed ZHMSCs device achieves the ultrahigh specific capacitance of 3.82 F cm −2 , large energy density of 1.36 mW h cm −2 and remarkable cyclic performance with the capacitance retention of 97.8 % after 12,000 cycles at 20 mA cm −2 . This work not only provides new insights on direct ink writing for high-performance Zn-Ion hybrid capacitor, but also offers a facile and efficient method to construct large-scale energy storage devices with high electrochemical performance for future energy storage.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
先进制造
·
能源存储与转换
✓ 已验证
DOI
高影响因子
NEW CARBON MATERIALS
·
2023
·
IF 5.7
Fang-yu Tao,Dan Xie,Wan-Yue Diao,Chang Liu,Hai-Zhu Sun,Wen-Liang Li,Jing-Ping Zhang,Xing-Long Wu
We report the fabrication of a lithiophilic Ti 3 C 2 T x MXene-modified carbon foam (Ti 3 C 2 T x -MX@CF) for the production of highly-stable LMBs that regulates Li nucleation behavior and reduces the volume change of a lithium metal anode (LMA). The 3D CF skeleton with a high specific surface area not only reduces the local current density to avoiding concentrated polarization, but also provides enough space to absorb the volume expansion during cycling. The excellent lithiophilicity of Ti 3 C 2 T x -MX produced by its abundant functional groups reduces the Li nucleation overpotential, guides uniform Li deposition without the formation of Li dendrites, and maintains a stable SEI on the anode surface. Consequently, a Li infiltrated Ti 3 C 2 T x -MX@CF symmetrical cell has an excellent cycling stability for more than 2 400 h with a low overpotential of 9 mV at a current density of 4 mA cm -2 and has a capacity of 1 mA h cm -2 . Furthermore, a Li- Ti 3 C 2 T x -MX@C||NCM111 full cell has a capacity of 129.6 mA h g -1 even after 330 cycles at 1 C, demonstrating the advantage of this method in constructing stable LMAs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Zhuo Cai,Yifei Ma,Micun Yun,Mei Wang,Zhaomin Tong,Jonghwan Suhr,Liantuan Xiao,Suotang Jia,Xuyuan Chen
In wearable and microelectronic devices, there is a rising need for ultrathin electromagnetic interference (EMI) shielding films with multifunction, such as Joule heating and photothermal conversion. MXene has shown promising applications in EMI shielding due to its excellent electrical conductivity , abundant surface functional groups, and layered structures. However, the self-stacking, poor mechanical strength and hydrophilicity of MXene hinder its applications. In this study, MXene/holey graphene (MX/HG) composite film is fabricated in a layered structure. The hydrogen bonds between HG and MXene improve the mechanical properties and prevent the self-stacking of MXene sheets. EMI shielding performances are investigated according to the monolayer MXene sheets' size and HG's mass ratio. As a result, the large lamella-based MX/HG composite film shows outstanding EMI shielding effectiveness (EMI SE) of 56.15 dB, excellent low-voltage-driven Joule heating (up to 100 °C at 3 V within 4 s), and high-efficiency photothermal conversion (up to 49.8 °C under 1000 W m −2 within 30 s) at a thickness of 5 μm. The multifunctional film achieves impressive EMI shielding, Joule heating, and photothermal conversion performances at a low thickness, showing great prospects in wearable and microelectronic device applications.
研究领域:
材料科学
·
纳米技术
·
电气工程
·
复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）